Alert archive / Illinois / Mesoscale Discussions in 2007
Mesoscale Discussion 574
The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2007, 11:14 PM CDT for 20 counties in Illinois; 16 counties in Indiana. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2007, 11:14 PM CDT (04:14 UTC)
- Expired
- Apr 25, 2007, 12:45 AM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 36 counties
Cass County, IL, Champaign County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Fulton County, IL, Logan County, IL, Macon County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Sangamon County, IL, Schuyler County, IL, Tazewell County, IL, Vermilion County, IL, Bartholomew County, IN, Boone County, IN, Fountain County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Johnson County, IN, Marion County, IN, Montgomery County, IN, Morgan County, IN, Parke County, IN, Putnam County, IN, Shelby County, IN, Tippecanoe County, IN, Vermillion County, IN, Warren County, IN
The radar
The Lincoln radar (KILX), 87 km from the middle of the area, began a volume at 04:13 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 4.2 hours before the alert went out and 26 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 36 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1658 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 10:05 PM CDT | Mesoscale Discussion | SPC | Alexander, Jackson, Monroe, Pulaski, Randolph, Union | 85 min |
| Apr 25, 12:45 AM CDT | Mesoscale Discussion | SPC | Alexander, Pulaski | 90 min |
Nearby
Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Indiana, 2007Every mesoscale discussion in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.